修复认证挑战与可信代理安全边界（07-17-auth-challenge-trusted-proxy-hardening）

deploy/trialrun/nginx.conf.example

@@ -12,7 +12,7 @@ server {
     proxy_http_version 1.1;
     proxy_set_header Host $host;
     proxy_set_header X-Real-IP $remote_addr;
-    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-For $remote_addr;
     proxy_set_header X-Forwarded-Proto $scheme;
     proxy_set_header X-Forwarded-Host $host;
     proxy_set_header X-Forwarded-Port $server_port;